Rutabaga (Brassica napus var. napobrassica) carries alleles that can broaden the genetic base of the spring canola. QTL analysis was performed by using a doubled haploid and a pedigree population of rutabaga × spring canola to identify the genomic regions of rutabaga controlling clubroot resistance, vernalization requirement and days-to-flowering and seed oil, protein, erucic acid and glucosinolate contents. Two QTL from chromosomes A8 and A3 were identified for resistance to clubroot disease where rutabaga alleles conferred resistance. A major QTL for vernalization response in rutabaga was mapped on A2 and this genomic region also affected days-to-flowering in spring growth habit plants. An additional QTL for days-to-flowering was detected on C6. A QTL for seed oil content was detected on C3 where rutabaga allele increased 0.7% oil. A protein QTL exerting an opposite effect was also detected in this genomic region, and an erucic acid QTL was detected about 16 cM away from the oil QTL. A major QTL for seed glucosinolate content was detected on A9. Clubroot resistance of rutabaga did not exert any effect on the flowering or seed quality traits.

大头菜（Brassica napus var. napobrassica) 携带的等位基因可以拓宽春季油菜的遗传基础。通过使用双单倍体和大头菜×春油菜的谱系群体进行 QTL 分析，以确定控制根肿病抗性、春化要求和开花天数以及种子油、蛋白质、芥酸和芥子油苷含量的大头菜基因组区域。鉴定了来自染色体 A8 和 A3 的两个 QTL 对根肿病的抗性，其中大头菜等位基因赋予抗性。大头菜春化反应的一个主要 QTL 定位在 A2 上，该基因组区域也影响春季生长习性植物的开花天数。在 C6 上检测到一个额外的开花天数 QTL。在 C3 上检测到种子油含量的 QTL，其中大头菜等位基因增加了 0.7% 的油。在该基因组区域还检测到一个具有相反作用的蛋白质QTL，在距油类QTL约16cM处检测到一个芥酸QTL。在 A9 上检测到种子硫代葡萄糖苷含量的主要 QTL。大头菜的根茎抗性对开花或种子质量性状没有任何影响。